Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67b465916dc33f7…

MALICIOUS

PDF

154.5 KB Created: 2021-06-26 03:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13a2c27b8c8b2ee3eeaca6c52208c13a SHA-1: 3494f9043d1ad757666af5983af3d5ed0620a61b SHA-256: e67b465916dc33f79958572fdc2d5e049f14c314c1fe59c61d0289b198a2c5f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple URLs, some hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://agapetown.net/ckfinder/userfiles/files/basidaxezudumavagapi.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f5bd0439c---68620446882.pdf
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/27492408832.pdf
    • https://cncostruzioni.com/userfiles/file/76117453023.pdf
    • http://ajivikafinance.com/userfiles/file/golomijir.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/debcbba709a5dd17cd885a626bf5de0c/favaxedo.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/bd1076da78709873ae71f64efedf0f3e/bufemom.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/94781756562.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd2537e7d0---wusogot.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a15af3bf2ec---wofolegururam.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/3b93a9b320f1be161608177b82a989de/25668771105.pdf
    • http://fenotropil.ru/userfiles/file/kodezudesebususorin.pdf
    • http://ttmplus.com/userfiles/files/24714026212.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc82c8b2d9b---xiraferepazajoparoru.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/886a003371a3f2dc495fe7b134461fa4/25805498216.pdf
    • https://renetravel.ro/images/files/2344184910.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6e01064cc0475e2fbf63e6817b2c0b2d/45611911844.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d036912bf---xukorifekitikovutobaxej.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b94ad31d7c---wesuvijaxowawokonunuteze.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/bbvjuo9u1e1g5tkb4itke90ta5/wuvuse.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1fcb0069123f25335d0f338484b046dd/29233147316.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4f98ec326f5344f80a23218673a0e86d/22000827730.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb2ecc5c20---pefuwasupepabagor.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073af4133798---20011944002.pdf
    • http://activesolutionelectric.com/images/file/mepebitabanitiw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+a+cliche
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ff3b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF3B 16792 bytes
font_01_sfnt_off00021751.bin
f7242a283a2505670961feb777371752f5dde07dc70b565da36ec6491232c162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21751 9996 bytes
font_02_sfnt_off00022da3.bin
928182caf2524282908faf7eb5e49d24734c3cc727011e88773283635eec567b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22DA3 17636 bytes

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